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table.c
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184 lines (156 loc) · 5.07 KB
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "wasm_c_api.h"
#define own
// A function to be called from Wasm code.
own wasm_trap_t* neg_callback(
const wasm_val_vec_t* args, wasm_val_vec_t* results
) {
printf("Calling back...\n");
results->data[0].kind = WASM_I32;
results->data[0].of.i32 = -args->data[0].of.i32;
return NULL;
}
wasm_table_t* get_export_table(const wasm_extern_vec_t* exports, size_t i) {
if (exports->size <= i || !wasm_extern_as_table(exports->data[i])) {
printf("> Error accessing table export %zu!\n", i);
exit(1);
}
return wasm_extern_as_table(exports->data[i]);
}
wasm_func_t* get_export_func(const wasm_extern_vec_t* exports, size_t i) {
if (exports->size <= i || !wasm_extern_as_func(exports->data[i])) {
printf("> Error accessing function export %zu!\n", i);
exit(1);
}
return wasm_extern_as_func(exports->data[i]);
}
void check(bool success) {
if (!success) {
printf("> Error, expected success\n");
exit(1);
}
}
void check_table(wasm_table_t* table, int32_t i, bool expect_set) {
own wasm_ref_t* ref = wasm_table_get(table, i);
check((ref != NULL) == expect_set);
if (ref) wasm_ref_delete(ref);
}
void check_call(wasm_func_t* func, int32_t arg1, int32_t arg2, int32_t expected) {
wasm_val_vec_t args, results;
wasm_val_vec_new(&args, 2, (wasm_val_t []){ WASM_I32_VAL(arg1), WASM_I32_VAL(arg2) });
wasm_val_vec_new(&results, 1, (wasm_val_t []){ WASM_INIT_VAL });
if (wasm_func_call(func, &args, &results) || results.data[0].of.i32 != expected) {
printf("> Error on result\n");
exit(1);
}
}
void check_trap(wasm_func_t* func, int32_t arg1, int32_t arg2) {
wasm_val_vec_t args, results;
wasm_val_vec_new(&args, 2, (wasm_val_t []){ WASM_I32_VAL(arg1), WASM_I32_VAL(arg2) });
wasm_val_vec_new(&results, 1, (wasm_val_t []){ WASM_INIT_VAL });
own wasm_trap_t* trap = wasm_func_call(func, &args, &results);
if (! trap) {
printf("> Error on result, expected trap\n");
exit(1);
}
wasm_trap_delete(trap);
}
int main(int argc, const char* argv[]) {
// Initialize.
printf("Initializing...\n");
wasm_engine_t* engine = wasm_engine_new();
wasm_store_t* store = wasm_store_new(engine);
// Load binary.
printf("Loading binary...\n");
#if WASM_ENABLE_AOT != 0 && WASM_ENABLE_INTERP == 0
FILE* file = fopen("table.aot", "rb");
#else
FILE* file = fopen("table.wasm", "rb");
#endif
if (!file) {
printf("> Error loading module!\n");
return 1;
}
fseek(file, 0L, SEEK_END);
size_t file_size = ftell(file);
fseek(file, 0L, SEEK_SET);
wasm_byte_vec_t binary;
wasm_byte_vec_new_uninitialized(&binary, file_size);
if (fread(binary.data, file_size, 1, file) != 1) {
printf("> Error loading module!\n");
fclose(file);
return 1;
}
fclose(file);
// Compile.
printf("Compiling module...\n");
own wasm_module_t* module = wasm_module_new(store, &binary);
if (!module) {
printf("> Error compiling module!\n");
return 1;
}
wasm_byte_vec_delete(&binary);
// Instantiate.
printf("Instantiating module...\n");
own wasm_instance_t *instance =
wasm_instance_new(store, module, NULL, NULL);
if (!instance) {
printf("> Error instantiating module!\n");
return 1;
}
// Extract export.
printf("Extracting exports...\n");
own wasm_extern_vec_t exports;
wasm_instance_exports(instance, &exports);
size_t i = 0;
wasm_table_t* table = get_export_table(&exports, i++);
wasm_func_t* call_indirect = get_export_func(&exports, i++);
wasm_func_t* f = get_export_func(&exports, i++);
wasm_func_t* g = get_export_func(&exports, i++);
wasm_module_delete(module);
// Create external function.
printf("Creating callback...\n");
own wasm_functype_t* neg_type = wasm_functype_new_1_1(wasm_valtype_new_i32(), wasm_valtype_new_i32());
wasm_functype_delete(neg_type);
// Try cloning.
own wasm_table_t* copy = wasm_table_copy(table);
assert(wasm_table_same(table, copy));
wasm_table_delete(copy);
// Check initial table.
printf("Checking table...\n");
check(wasm_table_size(table) == 2);
check_table(table, 0, false);
check_table(table, 1, true);
check_trap(call_indirect, 0, 0);
check_call(call_indirect, 7, 1, 7);
check_trap(call_indirect, 0, 2);
// Mutate table.
printf("Mutating table...\n");
check(wasm_table_set(table, 0, wasm_func_as_ref(g)));
check(wasm_table_set(table, 1, NULL));
check(! wasm_table_set(table, 2, wasm_func_as_ref(f)));
check_table(table, 0, true);
check_table(table, 1, false);
check_call(call_indirect, 7, 0, 666);
check_trap(call_indirect, 0, 1);
check_trap(call_indirect, 0, 2);
// Grow table.
// DO NOT SUPPORT
printf("Bypass Growing table...\n");
wasm_extern_vec_delete(&exports);
wasm_instance_delete(instance);
// Create stand-alone table.
// DO NOT SUPPORT
// TODO(wasm+): Once Wasm allows multiple tables, turn this into import.
printf("Bypass Creating stand-alone table...\n");
// Shut down.
printf("Shutting down...\n");
wasm_store_delete(store);
wasm_engine_delete(engine);
// All done.
printf("Done.\n");
return 0;
}